Abstract: TrueCrypt is an open source file and whole disk encryption software package that runs on Windows, Macs, and Linux. It has been downloaded nearly 30 million times, and is one of the most popular security tools used by journalists, human rights activists, and countless organizations around the globe. In the 10 years since its original release by an anonymous development team, however, there had never been a formal cryptanalysis and security audit of the software. This presentation is about how the TrueCrypt Audit Project came to pass and how some of the best security minds, cryptographic engineers and privacy advocates in the world came together to successfully conduct a public, crowd-funded, open technical audit of this software. Details of our findings and the many lessons learned along the way will be presented. Any and all questions will be answered!